Toward the end of trading Monday, the Dow traded up 0.36 percent to 15,291.36 while the NASDAQ gained 0.56 percent to 3,813.96. The S&P also rose, gaining 0.35 percent to 1,709.21. Top Headline Facebook (NASDAQ: FB ) has acquired mobile tech startup Onavo for an undisclosed sum. Onavo was founded in